example_8.rb

class MockActiveRelation < Hash
  def scoped?
    any?
  end

  def name_matching(name)
    new(name_scope: name)
  end

  def scoped_by_name?(name)
    self[:name_scope] == name
  end

  def email_matching(email)
    new(email_scope: email)
  end

  def scoped_by_email?(email)
    self[:email_scope] == email
  end

  def new(invocation)
    MockActiveRelation[merge(invocation)]
  end
end